Hi, I know it's a little offtopic, but I wanted to ask lvqcl to something, because I suppose he knows SOX internal routines quiet good yet.Would it be possible in the future make a plugin, which implements SOX deemphasis filter? (deemph: ISO 908 CD de-emphasis (shelving) IIR filter)

Till now I use for it wav impuls responses with FB2Ks Convolver plugin, but this isn't a right choice according to this german page:http://www.radonmaster.de/robernd/tAFILTER.html (thanks to author and Surfi for the link)On this side there are packed wav signals, with explanation, for testing different deemphasis filters ( there is also filter of old SOX version, which results very badly, it altered also stereo image... )Filter from recent SOX version is perfect, but solution with Convolver plugin (whatever impulse I use) alters a signal after closser look in Audition quiet a lot from what it should do, although frequencygoing could be very close and therefore after listening undistinguishable.

For me is use of Convolver plugin, at least for this purpose, a little unpractical and ultimately inaccurate, so therefore this idea. By the way, it may or may not be a problem, but I think SOX deemph filter has 32bit internal precision, which is, on the other side, for this kind of operation absolutely necessary.